Update comtypes package to 1.1.3 (#7831)
* Update comtypes to version 1.1.3.
This will be necessary to handle events from SAPI 5 once we have speechRefactor, as one of the parameters is a decimal which is not supported by our existing (very outdated) version of comtypes .
comtypes has now been added as a separate git submodule.
* Fix submodule URL for comtypes. Oops!
